| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [verb] | 5966 |
|
| 2 | once it [be] [verb] | 146 |
|
| 3 | once it be [verb] | 146 |
|
| 4 | once it [is] [verb] | 105 |
|
| 5 | once [pron] is [verb] | 97 |
|
